Fix Admin Notices not showing on the Dashboard (v2.4.2)

admin_notices fires everywhere, but prints inside #wpbody, which
DashboardTakeover hides entirely on the Dashboard (to hide the *native*
dashboard, not ours) — notices went down with it as collateral damage.
Notices::render_for_dashboard() now renders directly inside the visible
dashboard frame instead, called from DashboardTakeover::render_mount();
the normal admin_notices path bails on the Dashboard so it isn't
rendered twice.

Second, independent bug found along the way: wp-admin/js/common.js
unconditionally relocates every .notice element on the page to right
after the page's <h1>, regardless of where it was placed server-side —
without opting out, it would've silently moved our notice right back
into the hidden #wpbody. Used core's own documented `below-h2` class to
opt out, only for the dashboard render path.

Verified live: notice now shows correctly inside the dashboard frame
with proper dark styling, and dismisses correctly.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

app/package.json

@@ -1,6 +1,6 @@
 {
   "name": "aurora-admin-app",
-  "version": "2.4.1",
+  "version": "2.4.2",
   "private": true,
   "type": "module",
   "scripts": {